text: Segura and Quiles concluded that chilling stress only induces chlororespiration when the stem is significantly cool and the roots are simultaneously warmer compared to the average Spathiphyllum wallisii in controlled conditions. Segura and Quiles notice that PS II is present in chloroplast, (which is lacking in roots), thus by chilling the stem (which contains chloroplast), PS II ETCs can then be inhibited to trigger a reduction in PQ pool and as a result, chlororespiration.